What can cause inadequate heating in a heat pump system?

Inadequate heating in a heat pump system can often be attributed to a dirty or clogged air filter. When the air filter is not clean, it restricts airflow, which can significantly impact the heat pump's ability to draw in or circulate the air needed for efficient heating. Poor airflow can lead to the system overheating, triggering the limit controls to shut down the system, or simply reducing its overall heating capacity. Regular maintenance of the air filter is essential for ensuring optimal performance and efficiency of the heat pump.

While other factors, like lack of fuel supply, faulty wiring connections, and improperly sized ductwork, can contribute to heating issues in certain systems (especially gas or oil furnaces), they are not applicable for heat pumps, which primarily rely on electricity and the transfer of heat rather than combustion. A heat pump's operation is heavily dependent on its ability to move air efficiently, making the state of the air filter particularly crucial.